Dotan Cohen

This plugin supplies users with a taxonomy which makes available WordPress terms, PHP arrays, and HTML select lists containing hierarchical geographical areas.

GeoAreas

Provide a taxonomy called GeoAreas containing hierarchical geographical areas.

Michael Moore

luminfire

MySQL and MariaDB both have improved their spatial support in the last few years, but 
it’s not always easy to track down which functions are available in which version.
This tool will check which functions are actually available in your current MySQL or MariaDB database.
Once you know what spatial functions are available you can use your database to do GIS right within WordPress.
For more information on how to use these functions see the following resources:
<ul>
<li><a href="http://wherepress.com/" rel="nofollow ugc">WherePress.com – GIS for WordPress and MySQL</a></li>
<li><a href="https://mariadb.com/kb/en/mariadb/mysqlmariadb-spatial-support-matrix/" rel="nofollow ugc">MySQL and MariaDB Spatial Support Matrix</a></li>
<li><a href="https://docs.oracle.com/cd/E19957-01/mysql-refman-5.4/functions.html#spatial-extensions" rel="nofollow ugc">Spatial function reference for MySQL 5.4</a></li>
<li><a href="https://dev.mysql.com/doc/refman/5.5/en/spatial-function-reference.html" rel="nofollow ugc">Spatial function reference for MySQL 5.5</a></li>
<li><a href="https://dev.mysql.com/doc/refman/5.6/en/spatial-function-reference.html" rel="nofollow ugc">Spatial function reference for MySQL 5.6</a></li>
<li><a href="https://dev.mysql.com/doc/refman/5.7/en/spatial-function-reference.html" rel="nofollow ugc">Spatial function reference for MySQL 5.7</a></li>
<li><a href="https://mariadb.com/kb/en/mariadb/gis-functionality/" rel="nofollow ugc">Spatial function reference for MariaDB</a></li>
</ul>

WP Spatial Capabilities Check

Creates a page in the dashboard with a list of the spatial functions your database supports so you can do GIS with MySQL or MariaDB in WordPress.

GeoAreas vs WP Spatial Capabilities Check